Influence of water table management on corn and soybean yields

摘要: Abstract A 2-year field study was conducted in eastern Ontario to evaluate the effect of water table management (WTM) on yields strip-cropped corn (Zea mays L.) and soybean (Glycine max Merr.). The WTM treatments consisted two subirrigation with controls set at 0.50 m (CWT0.5) or 0.75 m (CWT0.75) from soil surface, a free drainage (FD) treatment (water table≥1.00 m below surface. Both were higher CWT than FD for both years. In 1995, 13.8% 2.8% greater 8.5% 12.9% greater, respectively, CWT0.5 CWT0.75 plots plots. Similarly, 1996, 6.6% 6.9% 37.3% 32.2% Yield increases obtained during attributed crop uptake as result tables. Comparison 1995 1996 weather data long-term average region shows that years had wetter-than-average conditions critical months July August, yield due could be expected even drier